Electric Digital Voltage Thro Durable Brushless Motor Bicycle Kit 48/60V 750W. The Kit Parts includes: 1x 48V 750W brushless Geared DC Motor 1x 48V 750W brushless controller 1x #420 Chain 1x Four-hole without tooth flywheel 1x Freewheel adapter 1x Sprocket 1x Throttle 1x Travel switch 1x Circuit breaker 1x Power Lock 1x charger interface 350W max load Capacity:250KG 500W max load capacity: 350 KG 750W max load capacity: 500 KG 350W max load Capacity:250KG 500W max load capacity: 350 KG 750W max load capacity: 500 KG 1000W Max Load Capacity:800KG 1200W Max Load Capacity:1000KG.